Messaging Channels
Subject Line Optimization
No more second-guessing
subject lines
Your personal copy assistant to help you experiment and finalize the best possible subject line.

Predict open rates before sending
Know how many people will open your emails by looking at your subject lines, before you send out a single email.


Add sentiments to your subject lines
SLO suggests words, metatags, and emojis that help build the sentiment of the subject line. Positive as well as negative sentiments generate higher open rates.
Increase your probability of success
You can never be absolutely sure. But better subject lines increase the chances of running a successful campaign and SLO assists with just that!

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Research-backed resources to up your email marketing

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There are a lot of important decisions that an email marketer needs to make during a typical workday. – What email content to send? – What promotional offer should be used? – Which subject line will provide the maximum engagement? – What is the right segment to send the campaign to? – What is the...
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